18314387 has 12 divisors (see below), whose sum is σ = 22944096. Its totient is φ = 14490000.

The previous prime is 18314377. The next prime is 18314393. The reversal of 18314387 is 78341381.

It is not a de Polignac number, because 18314387 - 2⁶ = 18314323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18314357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13739 + ... + 15012.

It is an arithmetic number, because the mean of its divisors is an integer number (1912008).

Almost surely, 2^18314387 is an apocalyptic number.

18314387 is a deficient number, since it is larger than the sum of its proper divisors (4629709).

18314387 is a wasteful number, since it uses less digits than its factorization.

18314387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28778 (or 28771 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

The square root of 18314387 is about 4279.5311659106. The cubic root of 18314387 is about 263.5911322863.

The spelling of 18314387 in words is "eighteen million, three hundred fourteen thousand, three hundred eighty-seven".